package com.example.rjwmproject.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.rjwmproject.common.CustomException;
import com.example.rjwmproject.dto.DishDto;
import com.example.rjwmproject.dto.SetmealDto;
import com.example.rjwmproject.entity.Setmeal;
import com.example.rjwmproject.entity.SetmealDish;
import com.example.rjwmproject.mapper.SetmealMapper;
import com.example.rjwmproject.service.SetmealDishService;
import com.example.rjwmproject.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {

    @Autowired
    private SetmealDishService setmealDishService;

    //新增套餐，同时保留套餐和菜品之间的关联关系
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);

        List<SetmealDish> setmealDishes=setmealDto.getSetmealDishes();
        setmealDishes=setmealDishes.stream().map((item)->{
//            item.setSetmealId(setmealDto.getId());
            item.setSetmealId(String.valueOf(setmealDto.getId()));
            return item;
        }).collect(Collectors.toList());

        //保存套餐喝菜品的关联信息，操作setmeal_dish，执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }

    //删除套餐，同时删除套餐和菜品的关联数据
    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
       //查询套餐状态，确定是否可以删除
        LambdaQueryWrapper<Setmeal> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);

        int count=this.count(queryWrapper);
        if(count>0){
            //如果不能删除，抛出一个业务异常
            throw new CustomException("套餐正在售卖中，不能删除");
        }

       //可以删除，先删除套餐表中的数据setmeal
        this.removeByIds(ids);

       // 删除关系表中的数据setmeal_dish
        LambdaQueryWrapper<SetmealDish> lambdaQueryWrapper=new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(SetmealDish::getSetmealId,ids);

        setmealDishService.remove(lambdaQueryWrapper);

    }

    //    根据id查询菜品信息和对应的口味信息
    @Override
    public SetmealDto getByIdWithFlavor(Long id) {
        Setmeal setmeal=this.getById(id);

        SetmealDto setmealDto=new SetmealDto();
        BeanUtils.copyProperties(setmeal,setmealDto);

        LambdaQueryWrapper<SetmealDish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getDishId,setmeal.getId());
        List<SetmealDish> setmealDishes=setmealDishService.list(queryWrapper);
        setmealDto.setSetmealDishes(setmealDishes);

        return setmealDto;
    }

    @Override
    public void updateWithFlavor(SetmealDto setmealDto) {
        this.updateById(setmealDto);

        LambdaQueryWrapper<SetmealDish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,setmealDto.getId());
        setmealDishService.remove(queryWrapper);
        List<SetmealDish> setmealDishes=setmealDto.getSetmealDishes();
        setmealDishes=setmealDishes.stream().map((item)->{
            item.setSetmealId(String.valueOf(setmealDto.getId()));
            return item;
        }).collect(Collectors.toList());
        setmealDishService.saveBatch(setmealDishes);

    }
}
